| 摘要 |
An optical apparatus is disclosed suitable for overlapping a plurality of radiation beams at the input end of an optical waveguide device, such as an optical fiber or fiber laser. The optical apparatus includes a plurality of deflecting facets, where each deflecting facet is oriented so as to deflect incident beams of radiation so that the deflected beams emanate from a virtual multi-beam radiation point source. An output relay optical system captures the deflected beams and causes them to overlap at the input end of the optical waveguide device. Input relay optical systems, which may be tiltable plane parallel plates, may be disposed between sources of the radiation beams and be used to redirect the radiation beams so that they emanate from a virtual multi-beam radiation point source. Methods for adjusting components of the optical apparatus to fine-tune the positions and directions of the radiation beams for more precise overlapping are also disclosed.
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